diff options
Diffstat (limited to 'minui/resources.c')
| -rw-r--r-- | minui/resources.c | 163 |
1 files changed, 153 insertions, 10 deletions
diff --git a/minui/resources.c b/minui/resources.c index 5e2062192..c0a9ccacb 100644 --- a/minui/resources.c +++ b/minui/resources.c @@ -33,6 +33,8 @@ #include "minui.h" +extern char* locale; + // libpng gives "undefined reference to 'pow'" errors, and I have no // idea how to convince the build system to link with -lm. We don't // need this functionality (it's used for gamma adjustment) so provide @@ -91,22 +93,25 @@ int res_create_surface(const char* name, gr_surface* pSurface) { png_set_sig_bytes(png_ptr, sizeof(header)); png_read_info(png_ptr, info_ptr); - size_t width = info_ptr->width; - size_t height = info_ptr->height; - size_t stride = 4 * width; - size_t pixelSize = stride * height; + int color_type, bit_depth; + size_t width, height; + png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, + &color_type, NULL, NULL, NULL); + + int channels = png_get_channels(png_ptr, info_ptr); - int color_type = info_ptr->color_type; - int bit_depth = info_ptr->bit_depth; - int channels = info_ptr->channels; if (!(bit_depth == 8 && ((channels == 3 && color_type == PNG_COLOR_TYPE_RGB) || (channels == 4 && color_type == PNG_COLOR_TYPE_RGBA) || - (channels == 1 && color_type == PNG_COLOR_TYPE_PALETTE)))) { + (channels == 1 && (color_type == PNG_COLOR_TYPE_PALETTE || + color_type == PNG_COLOR_TYPE_GRAY))))) { return -7; goto exit; } + size_t stride = (color_type == PNG_COLOR_TYPE_GRAY ? 1 : 4) * width; + size_t pixelSize = stride * height; + surface = malloc(sizeof(GGLSurface) + pixelSize); if (surface == NULL) { result = -8; @@ -118,8 +123,8 @@ int res_create_surface(const char* name, gr_surface* pSurface) { surface->height = height; surface->stride = width; /* Yes, pixels, not bytes */ surface->data = pData; - surface->format = (channels == 3) ? - GGL_PIXEL_FORMAT_RGBX_8888 : GGL_PIXEL_FORMAT_RGBA_8888; + surface->format = (channels == 3) ? GGL_PIXEL_FORMAT_RGBX_8888 : + ((color_type == PNG_COLOR_TYPE_PALETTE ? GGL_PIXEL_FORMAT_RGBA_8888 : GGL_PIXEL_FORMAT_L_8)); int alpha = 0; if (color_type == PNG_COLOR_TYPE_PALETTE) { @@ -129,6 +134,9 @@ int res_create_surface(const char* name, gr_surface* pSurface) { png_set_tRNS_to_alpha(png_ptr); alpha = 1; } + if (color_type == PNG_COLOR_TYPE_GRAY) { + alpha = 1; + } unsigned int y; if (channels == 3 || (channels == 1 && !alpha)) { @@ -173,6 +181,141 @@ exit: return result; } +static int matches_locale(const char* loc) { + if (locale == NULL) return 0; + + if (strcmp(loc, locale) == 0) return 1; + + // if loc does *not* have an underscore, and it matches the start + // of locale, and the next character in locale *is* an underscore, + // that's a match. For instance, loc == "en" matches locale == + // "en_US". + + int i; + for (i = 0; loc[i] != 0 && loc[i] != '_'; ++i); + if (loc[i] == '_') return 0; + + return (strncmp(locale, loc, i) == 0 && locale[i] == '_'); +} + +int res_create_localized_surface(const char* name, gr_surface* pSurface) { + char resPath[256]; + GGLSurface* surface = NULL; + int result = 0; + unsigned char header[8]; + png_structp png_ptr = NULL; + png_infop info_ptr = NULL; + + *pSurface = NULL; + + snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.png", name); + resPath[sizeof(resPath)-1] = '\0'; + FILE* fp = fopen(resPath, "rb"); + if (fp == NULL) { + result = -1; + goto exit; + } + + size_t bytesRead = fread(header, 1, sizeof(header), fp); + if (bytesRead != sizeof(header)) { + result = -2; + goto exit; + } + + if (png_sig_cmp(header, 0, sizeof(header))) { + result = -3; + goto exit; + } + + png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + if (!png_ptr) { + result = -4; + goto exit; + } + + info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) { + result = -5; + goto exit; + } + + if (setjmp(png_jmpbuf(png_ptr))) { + result = -6; + goto exit; + } + + png_init_io(png_ptr, fp); + png_set_sig_bytes(png_ptr, sizeof(header)); + png_read_info(png_ptr, info_ptr); + + int color_type, bit_depth; + size_t width, height; + png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, + &color_type, NULL, NULL, NULL); + int channels = png_get_channels(png_ptr, info_ptr); + + if (!(bit_depth == 8 && + (channels == 1 && color_type == PNG_COLOR_TYPE_GRAY))) { + return -7; + goto exit; + } + + unsigned char* row = malloc(width); + int y; + for (y = 0; y < height; ++y) { + png_read_row(png_ptr, row, NULL); + int w = (row[1] << 8) | row[0]; + int h = (row[3] << 8) | row[2]; + int len = row[4]; + char* loc = row+5; + + if (y+1+h >= height || matches_locale(loc)) { + printf(" %20s: %s (%d x %d @ %d)\n", name, loc, w, h, y); + + surface = malloc(sizeof(GGLSurface)); + if (surface == NULL) { + result = -8; + goto exit; + } + unsigned char* pData = malloc(w*h); + + surface->version = sizeof(GGLSurface); + surface->width = w; + surface->height = h; + surface->stride = w; /* Yes, pixels, not bytes */ + surface->data = pData; + surface->format = GGL_PIXEL_FORMAT_A_8; + + int i; + for (i = 0; i < h; ++i, ++y) { + png_read_row(png_ptr, row, NULL); + memcpy(pData + i*w, row, w); + } + + *pSurface = (gr_surface) surface; + break; + } else { + int i; + for (i = 0; i < h; ++i, ++y) { + png_read_row(png_ptr, row, NULL); + } + } + } + +exit: + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + + if (fp != NULL) { + fclose(fp); + } + if (result < 0) { + if (surface) { + free(surface); + } + } + return result; +} + void res_free_surface(gr_surface surface) { GGLSurface* pSurface = (GGLSurface*) surface; if (pSurface) { |